Improvement in steam vacuum-pumps



C. H. HALL.

lmprqvement in Steam Vacuum-Pumps.

No. 131,539t Patented sep.24,1872,

(@QQQMU UNITED STATES PATENT OFFICE.

CHARLES REALI., 0E NEW YORK, N. Y.

IMPROVEMENT IN STEAM VACUUM-PUMPS.

Specification forming part of Letters Patent N0. 131,539, datedSeptember 24, 1872.

CAsE Y.

To all whom it may concern:

. Be it known that I, CHARLES H. HALL, of New York city, in the State ofNew York, have invented a certain Improvement in Steam PumpingApparatus, of which the following is a specification:

The invention relates to that class of pumping apparatus in which thesteam is admitted into the same chamber or chambers with the water andpresses upon the surface thereof. The working parts are small,relatively, to the capacity for pumping, and the apparatus constitutesan emcient pumping means, operating rapidly and reliably. I employstrong chambers provided with valves for admitting water and holding itagainst its return, and also with valves for allowing it to be expelledthrough another pipe, to be conducted to an elevated reservoir or tosuch other point as may be desired, and the operations of being iilledwith water and being discharged succeed each other by reason of a changeof position of the steam valve or valves, governing the admission ot'steam from a boiler or steam-generator, which may be situated at adistance. There are two equal chambers in each set of the apparatus, thetwo filling and emptying alternately. The chamber which is filling withwater should complete its lling before its mate is emptied, and thechange of the steamvalve is etl'ected automatically on the completion ofthe emptying of the dischargingchamber. y

The following is a full and exact description of what I consider thebest means of carrying `into eifect one form of the invention. Theaccompanying drawing forms a part of this specification.

The plan of this invention is shown in vertical section. Here thewater-delivery valves p1 p2 are xed at a little distance apart on ahorizontal bar or rod, F, which forms a part of a iiexible connection orchain passing around pulleys, and carrying the steam-valves el e2,

mounted as shown. The steam-valve 'e2 is represented as open. lIhe steamtlows past it into the chamber A2 and expels the water therefrom. Sosoon as the water is expelled, until the water-level has sunk below theupper edge ofthe discharge-orifice, a portion of the steam escapes, thesurface is disturbed, and the instantaneous increase in the condensationinduces a partial vacuum, which draws backward on the current of waterbeing expelled, and by its action on the discharge-valve p2 moves therod F and its connections, closing the discharge-valve p2, and alsoclosing the steam-valve e2, while it opens the steam-valve e1 and alsothe discharge-valve p1. rlhe steam entering in full force past thesteam-valve c1 eXpels water from the chamber A1, and the same round ofoperations is repeated-the water-induction valves serving their usualfunctions, as will be obvious.

I have found, by experiment, that 'the loss of steam is slight whenworked in this manner in uncoated vessels of metal 5 but I propose inordinary practice to coat the interior of each chamber with japanvarnish, or with red lead and oil, or with a solution of rubber or thelike, to serve as a durable non-conductor of heat. I can make thechambers and the several connections of lead, to pump acids, or ot'glass or other material for any special uses requiring such.

What I claim as my invention is as follows: In combination with thechambers A1 A2, suitable water induction and eduction means, andprovisions for receiving steam intermittently into each, I claim theconnection F between the outlet-valves 191192, and the steam-valves ele2, arranged for joint operation, as specified. In testimony whereof Ihave hereunto set my hand this 18th day of May, 1872, in the presence oftwo subscribing witnesses.

Witnesses: C. H. HALL.

ARNOLD HRMANN, .W. C. DEY.

